feat(server): enhance workflow and script handling with new features

- Added `workflowLastModifiedAt` function to retrieve the last modified timestamp of workflow YAML files.
- Introduced `encodeBinaryForWire` and `reviveBinaryFromWire` functions for better handling of binary data in JSON.
- Implemented `useDeleteKv` hook for deleting key-value pairs in the web API.
- Enhanced `scriptsPluginFactory` to support dry-run evaluations with JSONata expressions.
- Added `set-dry-run-smoke.js` test to validate dry-run functionality.
- Updated profile configuration to include `overlayFromMerged` for better profile management.
- Introduced try-session management in the web components to handle step execution states.
- Improved various components to support new try-session features and maintain UI consistency.

Co-authored-by: Nasyarobby Putra <nasyarobby@gmail.com>

packages/server/test/json-preview-smoke.js

@@ -1,4 +1,9 @@
-import { jsonPreviewReplacer, summarizeBinary } from "../json-preview.js";
+import {
+  encodeBinaryForWire,
+  jsonPreviewReplacer,
+  reviveBinaryFromWire,
+  summarizeBinary,
+} from "../json-preview.js";
 import { serialize, toDisplayValue } from "../store.js";
 import { safeSerialize } from "../src/api/dry-run-logger.js";
 
@@ -53,4 +58,18 @@ if (typed.file.length !== png.length || typed.file.type !== "Buffer") {
   throw new Error(`Uint8Array: ${JSON.stringify(typed)}`);
 }
 
+const wired = encodeBinaryForWire({ file: png, n: 1n });
+if (wired.n !== "1" || wired.file.encoding !== "base64" || typeof wired.file.data !== "string") {
+  throw new Error(`encodeBinaryForWire: ${JSON.stringify(wired)}`);
+}
+const revived = reviveBinaryFromWire(JSON.parse(JSON.stringify(wired)));
+if (!Buffer.isBuffer(revived.file) || !revived.file.equals(png)) {
+  throw new Error("reviveBinaryFromWire failed to restore bytes");
+}
+const previewOnly = { type: "Buffer", length: png.length, preview: "89", truncated: true };
+const left = reviveBinaryFromWire(previewOnly);
+if (Buffer.isBuffer(left)) {
+  throw new Error("preview-only summary should not revive");
+}
+
 console.log("json-preview-smoke: ok");

packages/server/test/set-dry-run-smoke.js

@@ -0,0 +1,81 @@
+/**
+ * Smoke: set dry-run path (evaluateJsonata + envelope), mirrors
+ * POST /scripts/set/dry-run in src/api/scripts.js.
+ */
+import assert from "node:assert/strict";
+import { evaluateJsonata, SET_STEP_SCRIPT } from "../workflow-parse.js";
+import { normalizeStepResult } from "../step-result.js";
+import { safeSerialize } from "../src/api/dry-run-logger.js";
+
+assert.equal(SET_STEP_SCRIPT, "set");
+
+async function dryRunSet({ expression, data, context = {} }) {
+  if (typeof expression !== "string" || !expression.trim()) {
+    throw new Error("expression is required");
+  }
+  const incomingContext =
+    context != null && typeof context === "object" && !Array.isArray(context)
+      ? context
+      : {};
+  const config = { expression };
+  const ctx = { data: data ?? null, context: incomingContext, config };
+  const value = await evaluateJsonata(expression, ctx);
+  const result = normalizeStepResult(
+    { output: value, context: incomingContext, skipRemaining: false },
+    incomingContext,
+    SET_STEP_SCRIPT,
+  );
+  return {
+    status: "success",
+    output: safeSerialize(result.output),
+    context: safeSerialize(result.context),
+    skipRemaining: result.skipRemaining,
+  };
+}
+
+{
+  const res = await dryRunSet({
+    expression: '{"title": data.title, "ok": true}',
+    data: { title: "Hello" },
+    context: { runId: "dry" },
+  });
+  assert.equal(res.status, "success");
+  assert.deepEqual(res.output, { title: "Hello", ok: true });
+  assert.deepEqual(res.context, { runId: "dry" });
+  assert.equal(res.skipRemaining, false);
+}
+
+{
+  const res = await dryRunSet({
+    expression: "data.count + 1",
+    data: { count: 41 },
+    context: { token: "abc" },
+  });
+  assert.equal(res.output, 42);
+  // Sets never mutate context
+  assert.deepEqual(res.context, { token: "abc" });
+}
+
+{
+  let hit = false;
+  try {
+    await dryRunSet({ expression: "  ", data: {} });
+  } catch (err) {
+    hit = true;
+    assert.match(String(err.message), /expression is required/);
+  }
+  assert.equal(hit, true);
+}
+
+{
+  let hit = false;
+  try {
+    await dryRunSet({ expression: "data.{" , data: {} });
+  } catch (err) {
+    hit = true;
+    assert.ok(err instanceof Error);
+  }
+  assert.equal(hit, true);
+}
+
+console.log("set-dry-run-smoke: ok");